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3 years ago

Find the coordinates of the midpoint between (–2, -4) and (4, –4).

Mathematics

2 answers:

mrs_skeptik [129]3 years ago

6 0

Answer:

Step-by-step explanation:

Using mid point formula

Mid point = ((x1+x2)/2 , (y1+y2)/2)

= (2/2,-8/2)

=( 1, -4)

ZanzabumX [31]3 years ago

6 0

Answer:

The answer for the midpoint is (1,-4)

Step-by-step explanation:

To find the midpoint you can plot the two points on a graph and find the point that is right in the middle. The point right in the middle of the two points will be the midpoint. The midpoint is 3 units to the right of (-2,-4) and 3 units to the left of (4,-4).

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<h3>(c) The distribution of data</h3>

This is dependent on whether the dataset has an outlier or not.

From the figure, we have:

Male's data: presence of an outlier - use median
Female's data: absence of an outlier - use mean

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▹ Answer

▹ Step-by-Step Explanation

$\frac{4}{5} * \frac{3}{7} \\\\= \frac{12}{35}$

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Step-by-step explanation:

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A null hypothesis is that the mean nose lengths of men and women are the same. The alternative hypothesis is that men have a lon

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Answer:

b. There is not enough evidence to say that the populations of men and women have different mean nose lengths.

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Step-by-step explanation:

Develop the null and alternative hypotheses for this study?

We need to conduct a hypothesis in order to check if the means for the two groups are different (men have longer mean nose length than women), the system of hypothesis would be:

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Alternative hypothesis: $\mu_{men} > \mu_{women}$

Assuming that we know the population deviations for each group, for this case is better apply a z test to compare means, and the statistic is given by:

$z=\frac{\bar X_{men}-\bar X_{women}}{\sqrt{\frac{\sigma^2_{men}}{n_{men}}+\frac{\sigma^2_{women}}{n_{women}}}}$ (1)

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Let's assume that the calculated statistic is $z_{calc}$

Since is a right tailed test test the p value would be:

$p_v =P(Z>z_{calc})=0.225$

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b. There is not enough evidence to say that the populations of men and women have different mean nose lengths.

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